大庆石油地质与开发2025，Vol.44Issue(3)：168-174,7.DOI:10.19597/J.ISSN.1000-3754.202409029
四川盆地南部深层页岩储层天然裂缝对体积压裂裂缝网络的影响
Influence of natural fractures on fracture network of volume fracturing in deep shale reservoirs in southern Sichuan Basin
摘要
Abstract
In order to clarify the multi-fractures propagation mechanism of volume fracturing and the evolution law of fracture network of deep shale reservoirs in southern Sichuan Basin,based on field reservoir interpretation param-eters and parameters of natural fracture zones distribution,the Finite-Discrete Element Method(FDEM)is used to establish a multi-clusters fracture propagation model for natural-fracture zone reservoirs with volume fracturing.The influence of different natural fracture parameters on the extension of complex fracture networks during volume frac-turing is analyzed by numerical simulation.The results show that the high-stress difference conditions in deep shale gas reservoirs inhibit the activation of natural fractures and the formation of complex fracture networks.The increase in approaching angle of natural fracture zones promotes the hydraulic fracture propagation changed from single-cap-ture mode to composite propagation mode of capture,crossing and blocking.The smaller the approaching angle,the longer the fracture length,the greater the cohesion and the smaller the width of fracture zones,the lower complexity of the fracture network formed by volume fracturing,and the earlier the hydraulic fractures are to channel and inter-fere with adjacent sections or adjacent wells.The research provides guiding significance for preventing and control-ling fracturing-channeling interference,constructing efficient fracture networks and optimizing engineering parame-ters in deep shale reservoirs in southern Sichuan Basin.关键词
页岩储层/天然裂缝/体积压裂/多裂缝扩展/有限-离散单元/四川盆地南部Key words
shale reservoirs/natural fractures/volume fracturing/multi-fractures propagation/finite-discrete ele-ment/southern Sichuan Basin分类
能源科技引用本文复制引用
曾波,王玉丰,宋毅,阳星,杜雨柔,唐登济,胡若菡..四川盆地南部深层页岩储层天然裂缝对体积压裂裂缝网络的影响[J].大庆石油地质与开发,2025,44(3):168-174,7.基金项目
国家自然科学基金联合基金项目"四川深层页岩气水平井缝网压裂填砂暂堵物理机制研究"(U19A2043) （U19A2043）
中国石油天然气股份有限公司西南油气田公司重点项目"深层页岩气井压窜机理及防控技术研究"(20230302-31). （20230302-31）
